PartsTable
Technical Data Sheet
325B9 ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.473 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-176-8152, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
325B9
NSN: 5310-00-176-8152
FSC: 5310
CAGE: 80049 — DEPARTMENT OF THE AIR FORCE (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleHEXAGON
nut_height0.473 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.861 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
nominal_thread_size0.562 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch18
nondefinitive_spec/std_dataA2 TYPE
NSN5310-00-176-8152
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 325B9 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
NUT HEIGHT: 0.473 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN
THREAD SERIES: UNF
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
THREAD QUANTITY PER INCH: 18
NOMINAL THREAD SIZE: 0.562 INCHES IN
THREAD CLASS: 2B
WIDTH ACROSS FLATS: 0.861 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
NUT HEIGHT0.473 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN
THREAD SERIESUNF
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD QUANTITY PER INCH18
NOMINAL THREAD SIZE0.562 INCHES IN
THREAD CLASS2B
WIDTH ACROSS FLATS0.861 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NONDEFINITIVE SPEC/STD DATAA2 TYPE
MATERIALCOPPER ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
571242Interchangeable
interchangeable cross-reference
interchangeable
FFB571TYPEA2Interchangeable
interchangeable cross-reference
interchangeable
MILB857Interchangeable
interchangeable cross-reference
interchangeable
43-N-3938-4610Interchangeable
interchangeable cross-reference
interchangeable
H114AInterchangeable
interchangeable cross-reference
interchangeable
FFN836GRADEBTYPE3STYLE4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 325B9?
325B9 is a NUT,PLAIN,HEXAGON.
What parts can replace 325B9?
There are 19 known substitutes for 325B9: 571242, FFB571TYPEA2, MILB857 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 325B9?
325B9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-176-8152. This indicates validated use in U.S. government and defense supply chains.
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